Electric brazing- apparatus



F. J. HORTA ELECTRIC BRAZING APPARATUS Filed Feb. 11, 1922 2Sheets-Sheet 2 gmn/ntoz wwa m Patented Dec. 22, 1925.

UNITED STATES FELIX J. HORTA, OF OAKLAND, CALIFORNIA.

ELECTRIC BRAZING APPARATUS.

Application filed February 11. 1922. Serial No. 535,722.

To all whomit may concern:

Be it known that I, FELIX J. Hon'rA, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented certain new and useful Improvements in Electric BrazingApparatus, of which the following is a specification.

My invention is an improved method and apparatus for electricallybrazing together the lapped ends of articles.

Referring to the annexed drawing in which my invention is illustratedand which forms a part of this specification:

Figure 1. is a front elevation of my invention.

Figure 2 is a plan view of my invention.

Figure 3 is a front elevation of a modified form of my invention.

Figure 4 is a side view of one of the clamping wedges used in saidmodified form.

In the drawing 1 indicates a supporting frame formed with legs 2 whichrest on the floor. About midway of the height of the frame in theforward part thereof is formed an elongated table 3 extendingtransversely of the frame and beyond the sides thereof. The right end ofthe table 3 is elevated into an article rest 4, on the rear of which isa standard 5 formed at the top with a forwardly projecting lug 6 inwhich is screw seated a vertical clamp screw 7 on the end of which is agrip 8 with an insulated gripping surface 9. On the left end of thetable 3 is secured an upstanding rest 10 on a level with rest 4, andformed with a shoulder 11 at the rear. A plate 12 of insulation rests onthe table 3 within the frame 1, which plate has an upstanding rest 13extending from front to rear of the plate. Two cop per plates 14 and 15reston the plate 12 at the sides of the rest 13 respectively. Studs 16and 17 depend from the plates 14 and 15 respectively through the plate12 and the table 3 and nuts 18 and 19 screw on the lower ends of saidstuds against washers 20 and 21 of insulation on the under side of thetable 3 whereby the plates 14 and 15 and the plate 12 are detachablvsecured on the table 3. The studs 16 and 17 are insulated from the table3 by bushings 22 and 23 of insulation. On the plates 14 and 15adjustable slotted guides 24 and 25 are secured by means of screws 26and 27 respectively. A horizontal frame member 30 extends across the topof the frame 1, in which member are screw seated three vertical clampscrews 31, 32, and 33 directlyover the plate 14, rest 13 and plate 15respectively on the lower end of which screws are grips 34, 35, and 36provided with gripping faces 37, 38 and 39 of insulation. A horizontalmember 40 extends across the lower part of the frame 1 in which areseated two vertical screws 41 and 42 which bear against a plate 43. Thetable 3 has a depending flange 44 at its rear edge. A transformer 45 issecured at its forward end in the frame 1, the forward end of the core46 of said transformer being clamped in the frame between the flange 44and the plate 43 by the screws 41 and 42. The rear end of thetransformer coil 46 is secured in a casting 47 which has a leg 48resting on the floor. The terminals 49 and 50 of the transformer 45 arerespectively secured to the plates 14 and 15 by screws 51 and 52. Leads53 and 54 connect the trans former to an electric generator. The abovedescribed apparatus is designed especially for band saws, but applicantsinvention is, of course, capable of general application to variousarticles.

A broken band saw is placed on the table 3 upon the rests 4, 5, and 13and the plates 14 and 15 with the break in the saw directly over therest 13 and the back of the saw against the standard 5, shoulder 11 andguides 24 and 25, and the saw is clamped in such position by the screws7 31, 32 and 33. Brazing material is placed on the butted edges of thesaw and an electric current is sent through the transformer which heatsthe ends of the saw until the break is brazed together.

In the modified form of my invention shown in Figure 3 the clamp screws31, 32 and 33 are eliminated; the plates 14 and 15 are formed withraised seats 61 and 62 at their opposite inner edges; a block ofinsulation 63 is secured to the under side of the frame member 30 andclamp wedges 64 and 65 with beveled lower edges 66 are provided in placeof the clamp screws 31, 32 and 33. Otherwise the construction of thisform of my invention is the same as shown in Figures 1 and-2.

The broken saw band is placed upon the table 3 upon the rests 4, 10 and1-3 and the seats 61 and 62 with the break in the saw directly over therest 13 and the back of the saw against the standard 5, shoulder ll. andguides 24 and 25, and the saW is clamped in such position byt'he wedges6% ,and 65 which are driven between the saw and the block 63, the lowerbeveled edges of said wedges engaging tho-saw directly overthe seats 61and 62.

Having described my inV-entiOn'Iclaim:

1. In electrical brazing apparatus, a frame, a table mounted on saidframe, said table including a pair of terminal plates mounted thereonand insulated therefrom, aninsulated supporting element mounted on saidtable between said terminal plates,

clamping means located above said terminal plates for holding the twopieces of a broken article in position, and means connectedto saidterminal plates for conducting an electric current through said platesfor brazing said article.

2. :In electrical brazing apparatus, a frame, horizontally alinedelements secured to "saidframe for supporting the parts of abroken-article in-position for brazing, a pair of plates constitutingelectric terminals mounted upon and insulated. from said frame, wedgescooperating with the frame for clamping'the broken parts of said articlein proper position for brazing with the brokenparts meeting between saidterminal plates, a transformer, and electrical conduc- .tors forconnecting said terminal plates and said transformer to cause anelectric current topass through the broken parts.

In testimony whereof I afiix my signature.

FELIXJJ. 'HORTA.

